Keira Knightley and husband James Righton arrive for the Serpentine Gallery Summer Party in Hyde Park, central London, Tuesday, July 1, 2014. (Photo by Joel Ryan/Invision/AP)

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Keira Knightley and her husband of a year and a half, James Righton, are expecting their first child, Knightley's rep confirmed to Elle UK today. Multiple sources told Page Six the same thing yesterday. Rumors started swirling last month but really ramped up Sunday night, when Knightley did not imbibe during the (Moët-sponsored) British Independent Spirit Awards and wore a "billowy" dress unlike the fitted attire she usually dons. The 29-year-old is more than three months along, according to Page Six's sources; Elle guesstimates she's due in late March or April. (Click to read about another beloved actress who just gave birth to twins.)